Ocean Park Aquarium is smaller than the more commercialised aquariums, but is still worth the visit. An entertaining marine biologist took us on a guided tour around the park and provided very interesting information on all the species. The kids and us adults learnt quite a lot of information, so it's not just a place to see but a place to learn too. Don't expect an 'underwater world' experience though as it is more of an organice place and they even try to rehabilitate the turtles that wash up on the shore with diseases. And the biggest surprise of all, was the cafe/restaurant!!! I would say this is the best place to eat in Denham. Gourmet food at reasonable prices and with great views. We had the beef carpaccio with truffle oil (yum!) and the chicken and mango salad. So even if you're not that interested in the fish/sharks/turtles, come out for the food or at least a drink & to soak up the views!!!!